EP0177837A2 - Bodenbelag - Google Patents

Bodenbelag Download PDF

Info

Publication number
EP0177837A2
EP0177837A2 EP85112135A EP85112135A EP0177837A2 EP 0177837 A2 EP0177837 A2 EP 0177837A2 EP 85112135 A EP85112135 A EP 85112135A EP 85112135 A EP85112135 A EP 85112135A EP 0177837 A2 EP0177837 A2 EP 0177837A2
Authority
EP
European Patent Office
Prior art keywords
flooring
layer
lowermost
temperature
rubber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85112135A
Other languages
English (en)
French (fr)
Other versions
EP0177837A3 (en
EP0177837B1 (de
Inventor
Yoshiharu Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bando Chemical Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Bando Chemical Industries Ltd
Kawasaki Jukogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bando Chemical Industries Ltd, Kawasaki Jukogyo KK filed Critical Bando Chemical Industries Ltd
Publication of EP0177837A2 publication Critical patent/EP0177837A2/de
Publication of EP0177837A3 publication Critical patent/EP0177837A3/en
Application granted granted Critical
Publication of EP0177837B1 publication Critical patent/EP0177837B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N3/00—Arrangements or adaptations of other passenger fittings, not otherwise provided for
    • B60N3/04—Arrangements or adaptations of other passenger fittings, not otherwise provided for of floor mats or carpets
    • B60N3/048—Arrangements or adaptations of other passenger fittings, not otherwise provided for of floor mats or carpets characterised by their structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/744—Non-slip, anti-slip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y10S428/921—Fire or flameproofing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31826—Of natural rubber
    • Y10T428/3183—Next to second layer of natural rubber

Definitions

  • This invention relates to the flooring to be used for vehicles, vessels, etc.
  • the present invention has for its object to provide the flooring which, even if it is comparatively thin, is free from abrupt rise of the surface temperature for many hours in case of fire.
  • the flooring according to the present invention is made of a rubber compound containing a hydrate which discharges water of crystallization at the temperature within the range of 150 - 300°C. It comprises a lowermost rubber layer which makes direct contact with a floor board of a vehicle, a surface layer which composes a flooring surface layer portion and an intermediate layer which controls heat conduction from the lowermost layer to the surface layer. These three layers are integrated into one by bonding.
  • the lowermost rubber layer which makes contact with a floor board contains a hydrate
  • water of crystallization is discharged and this water of crystallization deprives the lowermost layer of evaporation heat and consequently controls the rise of the lowermost layer temperature.
  • the reason why it is so devised that water of crystallization is discharged at 150°C at the lowest is to prevent water of crystallization from being discharged in the vulcanizing process which is done at a temperature lower than 150°C.
  • the reason why the water of crystallization discharging temperature is set below 300 °C is that at the time when water of crystallization is discharged at a temperature higher than 300°C, it is already difficult to maintain the surface temperature of flooring below 150 - 160°C.
  • the intermediate layer bonded to the upper surface of the lowermost rubber layer containing a hydrate checks heat conduction from the lowermost rubber layer to the surface layer and thus controls the rise of surface temperature of the flooring.
  • a hydrate of the lowermost layer there are available hydrated compound, such as aluminium hydroxide (Alz 0 3 ⁇ 3H 2 0), hydroxy salt having structural water, aqua salt, such as CaClz ⁇ 6Hz 0 having coordination water, salt such as CaClz -2Hz 0 having lattice water,salt having water hydrogen bonded to anion, sodium sulfite, etc.
  • Alz 0 3 ⁇ 3H 2 0 aluminium hydroxide
  • aqua salt such as CaClz ⁇ 6Hz 0 having coordination water
  • salt such as CaClz -2Hz 0 having lattice water
  • salt such as CaClz -2Hz 0 having lattice water
  • One of the materials desirable for the intermediate layer is a rubber layer having a heat conductivity of less than 35Kcal/m ⁇ h ⁇ deg.
  • a combining agent for reducing the heat conductivity of the rubber layer there are available cork grains, chips of wood, glass balloon, inorganic balloon, waste fiber, waste cotton, etc.
  • Another material desirable for the intermediate layer is a canvas layer formed with at least two sheets of cotton canvas.
  • Cotton which forms this canvas layer decomposes at a comparatively low temperature or at about 150°C and after decomposition it carbonizes and lowers in its heat conductivity. Therefore, the temperature rise of this canvas layer after the canvas layer has reached the cotton decomposing temperature is checked while cotton is being decomposed and even after decomposition of cotton, the intermediate layer checks heat conduction to the surface layer due to reduction in its heat conductivity.
  • the surface layer can be formed with a material from which general function of flooring, namely, wear-resistance, slipping-resistance, chipping-resistance, cigarette-resistance, etc. can be obtained, for example a rubber compound.
  • the lowermost rubber layer is prevented from rising in temperature far above the water of crystallization discharging temperature while water of crystallization is discharged and heat conduction from the lowermost layer to the surface layer is checked by the intermediate layer.
  • the rise of surface temperature of flooring can be controlled for many hours in case of fire, namely, the flooring according to the present invention provides ample time to allow those in a vehicle to get out safely in case of fire and does not involve the increase in weight of a vehicle.
  • FIG. 1 denotes a floor board of a vehicle.
  • a flooring 2 of three-layer construction more particularly, a lowermost rubber layer 3 which makes direct contact with the floor board 1 is formed with a rubber compound containing a hydrate, an intermediate layer 4 is formed with a rubber compound of low heat conduction and a surface layer 5 which constitutes a surface layer portion of the flooring 2 is formed with a rubber compound having a function of general flooring.
  • the lowermost rubber layer 3 (Compounding A)
  • the intermediate layer 4 (Compounding B)
  • the surface layer 5 (Compounding C)
  • Heat conductivity of the lowermost rubber layer 3 0.380Kcal/m ⁇ h ⁇ deg Heat conductivity of the intermediate layer 4 0.210Kcal/m ⁇ h ⁇ deg Heat conductivity of the surface layer 5 0.410Kcal/m ⁇ h ⁇ deg
  • This embodiment relates to the flooring for a vehicle and is shown in Fig. 2.
  • a flooring 10 shown in Fig. 2 an intermediate layer 11 is formed in laminated state by bonding together three sheets of cotton canvas 12 with a bonding rubber.
  • the others are almost the same as in the case of the flooring of Embodiment 1.
  • the cotton canvas 12 is woven of warp of 20's 3-ply (density - 74 strands/5c.m.) and weft of the same construction as the warp.
  • the decomposing temperature of cotton yarn is about 150°C.
  • Nylon canvas of Comparative Example 4 is woven of warp of 20-denier 1-ply (density - 74 strands/5cm) and weft of the same construction as the warp.
  • Polyester canvas of Comparative Example 5 is woven of warp of 870-denier 1-ply (density - 74 strands/5cm) and weft of the same construction as the warp. Both canvases are subjected to bonding treatment, similarly to cotton canvas of Embodiment 2 and are set to the same volume as the cotton canvas.
  • Rubber Compounding D of the lowermost layer of Comparative Example 4 and 5 is as shown below.
  • Embodiments 1 and 2 indicate that the surface temperature of flooring at the lapse of 60 minutes from the start of test is below 130 °C and this is deemed to allow ample time for those in a vehicle to get out safely in case of fire. From the comparison of flooring of Embodiment 1 with those of Comparative Examples 2 and 3, it can be seen that only either one of the rubber layer of low heat conduction and the rubber layer containing a hydrate is not sufficient enough to check the rise of surface temperature of flooring.
  • the flooring of Comparative Example 2 is controlled in the rise of temperature better than Comparative Example 1 but at the lapse of about 35 minutes and thereafter, the flooring of Comparative Example 2 shows surface temperature exceeding 160°C.
  • the flooring of Comparative Example 3 shows that the surface temperature is checked below 150°C which is the water of crystallization discharging temperature bur at the lapse of about 35 minutes and thereafter, the surface temperature exceeds 160°C.
  • Floorings of nylon canvas and polyester canvas as in the case of Comparative Examples 4 and 5 show better control of temperature rise than in the case of Comparative Example 1 which uses only rubber layers but their surface temperature exceeds 160 °C at the lapse of about 35 minutes and thereafter and satisfactory results cannot be obtained.
  • the lowermost rubber layer 3 and the surface layer 5 are of single layer but the construction of plural layers, namely, bonding lamination of at least two rubber layers of different compounding may be adopted.
  • the surface layer 5 may be formed with other material, for example, synthetic resin such as vinyl chloride resin, wood, cloth (carpet), marble, etc., each having the function of general flooring.
  • the intermediate layer is composed of three sheets of cotton canvas bonded together but may be composed of one sheet of cotton canvas, two sheets or more than four sheets of cotton canvas. Furthermore, in order to check the rise of surface temperature of flooring to a low extent for many hours, the intermediate layer may be made thicker.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Floor Finish (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
  • Passenger Equipment (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
EP85112135A 1984-09-25 1985-09-24 Bodenbelag Expired - Lifetime EP0177837B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP200200/84 1984-09-25
JP59200200A JPS6183381A (ja) 1984-09-25 1984-09-25 床材

Publications (3)

Publication Number Publication Date
EP0177837A2 true EP0177837A2 (de) 1986-04-16
EP0177837A3 EP0177837A3 (en) 1987-04-15
EP0177837B1 EP0177837B1 (de) 1990-08-08

Family

ID=16420462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112135A Expired - Lifetime EP0177837B1 (de) 1984-09-25 1985-09-24 Bodenbelag

Country Status (5)

Country Link
US (1) US4591532A (de)
EP (1) EP0177837B1 (de)
JP (1) JPS6183381A (de)
CA (1) CA1228097A (de)
DE (1) DE3579093D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998022529A1 (en) * 1996-11-18 1998-05-28 Redwood Rubber Llc Process for use of crumb rubber in moldable formulations

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE455798B (sv) * 1985-11-04 1988-08-08 Hadak Security Ab Brandherdig veggkonstruktion
US7444748B2 (en) 2004-10-29 2008-11-04 Macneil David F Close-conforming vehicle floor tray with reservoir
US7316847B2 (en) * 2004-10-29 2008-01-08 Macneil David F Vehicle floor tray
USD983717S1 (en) 2021-07-02 2023-04-18 Macneil Ip Llc Scraper panels for golf cart mat

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2451234A1 (de) * 1973-11-01 1975-05-07 Vyzk Ustav Pletarsky Mehrschichtiger isolierender bodenbelag
FR2309663A1 (fr) * 1975-04-29 1976-11-26 Du Pont Procede d'ignifugeage d'articles d'ameublement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1107557B (de) * 1955-01-13 1961-05-25 Dr Med Walther Temps Schuheinlegesohle u. dgl. mit einer die Schweissbildung vermindernden Impraegnierung
JPS56130341A (en) * 1980-03-19 1981-10-13 Takeda Chemical Industries Ltd Manufacture of refractory heat insulating material
FR2510132A1 (fr) * 1981-07-24 1983-01-28 Inst Francais Du Petrole Revetements marins anti-corrosion et anti-salissures
US4428999A (en) * 1981-08-20 1984-01-31 Textured Products Refractory coated and vapor barrier coated flame resistant insulating fabric composition
GB2104838B (en) * 1981-08-28 1985-02-20 Glaverbel Fire-screening panel
JPS59123657A (ja) * 1982-12-28 1984-07-17 川崎重工業株式会社 複合板

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2451234A1 (de) * 1973-11-01 1975-05-07 Vyzk Ustav Pletarsky Mehrschichtiger isolierender bodenbelag
FR2309663A1 (fr) * 1975-04-29 1976-11-26 Du Pont Procede d'ignifugeage d'articles d'ameublement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998022529A1 (en) * 1996-11-18 1998-05-28 Redwood Rubber Llc Process for use of crumb rubber in moldable formulations

Also Published As

Publication number Publication date
JPH041115B2 (de) 1992-01-09
EP0177837A3 (en) 1987-04-15
DE3579093D1 (de) 1990-09-13
US4591532A (en) 1986-05-27
CA1228097A (en) 1987-10-13
EP0177837B1 (de) 1990-08-08
JPS6183381A (ja) 1986-04-26

Similar Documents

Publication Publication Date Title
US7449231B2 (en) Wood flooring laminated with high pressure veneer and impregnated low weight printing paper
JP5771244B2 (ja) ナノ粒子太陽光制御コンセントレートを含むポリマーブレンドの製造方法
AU566186B2 (en) A laminate sheet and a process for making the sheet
US3447996A (en) Stratified wood composition panel
US20060003138A1 (en) Film laminate with at least one diffusion-barrier layer and its use in vacuum insulation panels
EP0177837A2 (de) Bodenbelag
JP2009035459A (ja) 積層体
AU2019281328A1 (en) Floor panel and method for manufacturing a floor panel
CN109263181A (zh) 一种轻质纤维增强热塑性复合板材及其制备方法
CN113677530A (zh) 地板装饰材料
KR100741377B1 (ko) 자동차 실내 천장재와 그 제조 방법
US4830900A (en) Interior material for cars
CA1197766A (en) Flame-retarded copper clad laminates
JPH0435438Y2 (de)
JPH08300526A (ja) 輸送機器用部材
JPH0999511A (ja) 合成樹脂複合材およびその製造方法
DE69404866T2 (de) Verfahren zur herstellung dekorativer schichtstoffplatten
KR102624899B1 (ko) 마루 바닥재 및 이의 제조방법
CN216993352U (zh) 一种高强度人造皮革
KR100982359B1 (ko) 천연 또는 합성 섬유와 발포층이 조화된 바닥재
KR102448445B1 (ko) 다층 바닥장식재
EP4163457A1 (de) Dekorpaneel und verfahren zur herstellung eines paneels
CN211165690U (zh) 一种车用隔音地毯
KR100353077B1 (ko) 자동차대쉬보드용절연패드
JPH06280375A (ja) 床 材

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19870910

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KAWASAKI JUKOGYO K.K.

Owner name: BANDO CHEMICAL INDUSTRIES, LTD.

17Q First examination report despatched

Effective date: 19880712

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3579093

Country of ref document: DE

Date of ref document: 19900913

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930917

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930927

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19931117

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940924

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940924

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST